Writing instrument



FIG. 1 shows a perspective view of a writing instrument showing my new design;

FIG. 2 shows a first side elevation view of FIG. 1;

FIG. 3 shows a back elevation view of FIG. 1;

FIG. 4 shows a second side elevation view of FIG. 1;

FIG. 5 shows a front elevation view of FIG. 1;

FIG. 6 shows a top plan view of FIG. 1; and,

FIG. 7 shows a bottom plan view of FIG. 1. 

CLAIM The ornamental design for a writing instrument, as shown and described. 